RT7231GQW

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The RT7231GQW is a 6V to 40V input, 2A DC-DC buck switching regulator. It features an adjustable high voltage and adjustable low voltage for high safety and flexibility. It provides a low-noise and power savings solution with its ultra high efficiency up to 95%. It offers a high-precision current-mode frequency control and accurate output voltage of ±2.5% and temperature drift as low as 0.05%.

This device is suited for a broad range of applications, such as telecom, networking, industrial control and automotive. RT7231GQW is ideal for PoE (Power over Ethernet) and LED driver applications. It provides high safety, precision, and flexibility to enable users to customize their product designs.

Application Field

• Telecom, networking and industrial control equipment
• Automotive systems
• PoE (Power over Ethernet) and LED driver applications

Working Principle

The RT7231 operates as a DC-DC buck switching regulator. It adopts a constant-current drive control technique to ensure high-frequency operation and low-noise switching output. The device supports a 6V to 40V input voltage range and adjustable high voltage up to 600V, providing flexibility for system designs. It features a high-precision current-mode frequency control and low-temperature drift for stable and accurate output.

The RT7231 provides a wide range of output voltage options, allowing users to customize their designs. For instance, it can be used to implement two-step buck conversion in one switching regulator. It supports PWM/PFM auto-switching mode (ASM) with optimized switching frequency and PWM/PFM dual-mode operation.

The RT7231 further includes a high efficiency synchronous rectifier (HSR) to reduce the power losses due to rectifier diode conduction. It also integrates a power save mode (PSM) that reduces current consumption in light loading conditions. The device has built-in over-temperature protection (OTP) to ensure reliable and safe operation.

The RT7231 also features a low quiescent current of 15µA which results in power savings. Additionally, it provides a low-noise synchronous rectifier for low noise power supply and improved signal integrity. The device integrates an adjustable current guard circuit to protect from large inrush currents.

Overall, the RT7231 is an ideal choice for a wide range of applications requiring high safety, precision, and flexibility. It can be used to implement two-step buck conversion in one switching regulator, thereby reducing complexity and cost.

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